celery, one bye one queue and parallel many in time queues

Question

I am trying to use celery to manage tasks. The problem i am into now, that i have many minor tasks(emails, cross-server posts, etc) And time consumable tasks, like file uploads. Is there any way, to specify, that uploads will always will be one by one. Only one task executed in time, while other workers will work on other queues? JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

An effective way to serialize the execution of tasks is to use a mutex (Mutual Exclusion). Python's threading module has a Lock object which can be used to this effect: # ... module_lock = threading.Lock() # or make this an attribute in an object with sufficiently-large scope # ... def do_interesting_task(): with module_lock.acquire(): interesting_task() "Abandon all hope, ye who enter here." Mutexes and semaphores are powerful tools, but used unwisely they will yield deadlocks and occasionally eat your lunch.